Engine-governor.



N 1 .72., Patented Apr. 30, IN.

A. S. F. ROBINSON.

ENGINE 'eovannoa;

(Application filed Aug. 21, 1899.) V

' 9 Sheets-sheaf I.

(No Model.)

mi Nonms PETERS co PHOTOLITHDH wAsNmc'ron. a, c.

No. 672,9l5. Patented Apr. 30; I90l. A. s. F. nosmson.

ENGINE GOVERNOB.

(Application file'd Aug. 21, 1899.)

(No Model.) 7

'9 Sheets-Shut 2.

INVENTUR #JW No. 672,9l5. Paton-ted Apr. 30, I90l. A. S. F. ROBINSON.

ENGlNE GOVERNOR.

(Ap ilication filed Aug. 21, 1899.] (No Model.) 9 Sheets8 heat 3.

W/ TNEEEEE No. 672,9l5. Patented Apr. 30 I901. I

A. s. F. nosmsou.

ENGINE GOVERNOR.

(Application filed Aug. 21, 1899.)

(No Model.) 9 Sheets-Sheet 4.,

:qs co.. PHOYOLITHOH WASHINGTON n c No. 672,915. Patehted Apr. 30, I901.

A. s. r. noamson.

zuamz'sovsnuon. (Application flldd Aug. 21 1899.)

9 Sheets-Shea t 6.

(lo HUGH.)

Win/E5555 IN UENTD R 31: Noam: PETERS pp vnju rouma, wAsnmmou.

No. 672,9l5.

(No Model.)

WITN E55E5 Patented Apr. 30, I90L A. s. F. ROBINSON. Enemz'aovsnnon:

(Application filed Aug. 21, 1899.)

9 sheets-Sheet 7.

Patented A rQao, I90]. A. S. F. ROBINSON.

ENGINE GOVERNOR.

(Application filed Aug. 21, 1899.)

9 Sheets-Sheet 8.

(No Model.)

INL/ENTUR X- m u l J E3? W No. 672,9l5. Patented Apr. 30, 190i.

A. s. F, ROBINSON.

ENGINE GOVERNOR.

(Application filed Aug. 21, 1B99.)- (No Model.) 9 Sheets-Shoat 9.

m: NORRIS pzrcns co.v Puo'rawmo. WASHINGTON, 0 c4 UNITED STATES PATENT ()FFicE.

ARTHUR SAMUEL FRANCIS'ROBINSON, OF WANTAG I, ENGLAND.

ENGINE-GOVERNOR.

SPECIFICATION forming part of Letters Patent No. 672,915, d.ated April 30, 1901.

Application filed August 21, 1899. Serial No. 727,957. (No model.)

.Britain and Ireland, residing at Wantage, in

the county of Berks, England, have in vented Improvements in Engine-Governors, of which the following is a specification.

This invention has reference to improvements in expansion-governors of the shaft,

wheel, or drum type, whereby great sensitiveness and stability are obtained without the aid of inertia-or friction devices, dash-pots, or locking-gear, such as have heretofore been used to secure the necessary stability when the governor is used in connection with slide or other. Valves oifering considerable resistance to movement. For this purpose there are provided in connection with the shifting eccentric and thespring-controlled mechanism for directly moving it in one direction transverse to the axis of the governor-shaft two similar pairs of'levers that. are unprovided with. special weights or other concentrated inertia devices such as have heretofore been commonly used and which are pivoted to the governor wheel or drum at opposite sides of the axis thereof, the two' levers of each pair being pivoted near together and suitably connected at a short distance from their pivots to the spring-controlled mechan ism carrying the shifting eccentric. 'The arrangement is such that when the governor is in action the levers or the long arms thereof lend under the action of'centrifugal. force to turn outward'about their pivots andthrough their connections with the spring-controlled mechanism to move the eccentric in a direction transverse 'to the axisof the'shaft and against the spring action which tends to move the eccentric in the opposite direction.

By the construction described great sensitiveness and stability are obtained in a sim; ple manner, the parts of the governor moving underv variationof load in a practically deadbeat manner. The pairs of levers may be connectcd'to the. spring-controlled mechanism through any suitable means, such as flexible connections passing around guide pulleys or rods or links. '7

MyinventiOn can be applied in connection withshaft-governors.of'various types, and e's .blade.

constructions.

pecially in connection with those wherein the shifting eccentric is connected to the free or movable ends of a pair of flexible spring arms or blades that are fixed at their other ends to the governor-drum, as described in the specification of a former atent granted me, No. 549,020, of 1895.

Figure 1 of the accompanying illustrative drawings shows, partly in side elevation and partly in section, on the line A A of Fig. 1, an engine-governor of the kind referred to constructed according to the present invention. Fig. 2 isa section on the line B B of Fig. 1. Fig. 3 shows in side elevation one of the pairs of lovers used in such governor. Fig, 4 is a sectional plan View of a pair of guide-pulleys with spring-back and spring- Figs. 5, 6, 7, and 8 are part side elevations,-with the governor-drum in section, showing modified constructions of the governor. Fig. 6 is a plan of one of the levers shown in Fig. 6. Fig. 9 is a part side elevation showing another modified construction, and Figs. 9 9", and 9 are detail views of parts. thereof. FigJlO is a side elevation, and Fig. 10 a plan, showing partof a modifiedconstruction of governor. Fig. 11 is a part side elevation showing another modification. Fig. 12 is a side elevation, and Fig. 13 a cross-section, on theline O O of Fig. 12, showing another further modified construction of part of the governor. Figs. 14 and 15 are side elevations showing further modified Fig. 16 is a detail view. The figures are drawn to ditferentscales.

In Figs. 1 to 4, inclusive, 0. is the shifting eccentric, fixed upon one of two guide-plates b, that are arranged to slide against opposite sides of thiagovernor-drum c and .are connected together by cross-bolts d, that Work in slots 6 in the sides of the drum, two of the bolts being connected through a'connectingpiecef to the movable ends of two curved.

pairs'of oppositely-arranged spring-blades l,

allas and for the purposes described in my said former specification. mmare the pairs of levers for controlling the movement of the shifting eccentric a, according to this invention. The two levers of each pair are pivoted at one end upon a common pin n, fixed to the governor-drum 0, near the periphery thereof, and have their free ends extending inward toward the central portion of the drum, the two pins n being arranged diametrically opposite to each other. 7

In the arrangement shown in Figs. 1 to 5, inclusive, the levers m of each pair are adjustably connected, as by cross-pins 0, arranged near the pivoted ends of the levers, and eyebolts or hooksp to the two ends of flexible connectors q, such as wire ropes, that pass around compensating guide-pulleys r, journaled in a pair of links 3, jointed to a holderi, (hereinafter called a spring-back,) that acts against the inner side of the central portion of the corresponding spring-blade g.

.In the example shown in Figs. 1 to 4; there are two ropes q and two guide-pulleys r for each spring-blade 9; but there may be only one of each or more than two of each, as may be desired in any particular case.

In Fig. 6 the flexible connectors q consist of chains, such as bicycle-chains.

In the modified arrangement shown in Fig. 7 the levers m of each pair are separately connected near their pivoted ends by the crosspins 0 and a pair of rods or links M (hereinafter called links) to the opposite ends of a common compensating link or lever'v, that is jointed at its central portion to the pair of parallel links 8, jointed to the corresponding spring-back t.

In the modified arrangement shown in Fig. 8 the two links M, corresponding to each pair of levers m, are connected by a common pin to direct to the pair of links 5, jointed to the spring-back t.

In the arrangement shown in Fig. 9 the two levers m of each pair are connected to the corresponding spring-backt by a pair of rods u,a yoke-piece '0, and a stirrup-shaped link 8. Each rod u is provided (see Fig. 9) at one end with a block 11, having trunnions u that fit into slots m, Fig. 9, in the pair of bars of which each lever m is composed, and the other end of the rod is formed with a link u, that fits over the corresponding hook-like end of the yoke-piece '22. This yoke-piece, Fig. 9", is grooved at the center to receive the central portion of the link s, the end portions of which are made hook shape and engage the ends of a pin 15 on the spring-back Z. (See Fig. 9.) Each of the levers m of a pair is made to exert the same force upon the connection between the pair of levers and the corresponding spring-blade. Where one lever is weighted to some extentas, for example, by a hook p and plate P, as in Figs. 1, 2, and 3--the other lever of the pair is provided with a corresponding compensating or balance weight Q. The connection between each pair of levers m and the corresponding spring-blade g may be made adjustable. Thus in Fig. 9 each rod u is screw-threaded at one end and the block 11, is made as a nut.

Figs. 10 and 10 show an arrangement somewhat resembling that shown in Fig. 7, but wherein the links it of each pair are for the purpose mentioned made shorter and the link or lever 'v, jointed to them, is connected to the pair of links 5 of the corresponding springback 15 by a pair of links so, a screw-threaded rod y, and a swivel-nut z. In Fig. 11 a screwthreaded rod y and a swivel-nut z is for a like purpose introduced between the connected ends of the pair of links u and the links 3 of the corresponding spring-back t.

Various retarding means may be provided for preventing any sudden relative movement between the two lengths of the flexible connector q or the two parallel connectinglinks to, that connect each pair of lovers 'm to the corresponding spring-back t, in order to prevent, as far as possible, either lever of a pair being moved outward in advance of the other from any cause-as, for example, the unequal action of gravity on the two levers in certain positions thereof. For this purpose when flexible connectors q are used to connect each pair of levers m to a spring-blade g the two lengths or plies of each connector may be tied together by a cross-piece 1, as shown in Fig. 5. When pairs of links u are used, in Fig. 7, a block 2 of material such as india-rnhber may be forced between the outer ends of each pairof links, as shown, or the two links of each pair of links may be connected together by a spring-blade 3, that will ofier resistance to being bent and which is fixed to extensions 4, attached to one or to each end of the pair of links (see Figs. 10 and 10") or to the centralportion of the pair of links, as indicated in dotted lines in Fig. 7, or separate links 5 may, as shown in Figs. 12 and 13, be forced laterally into frictional contact with the sides of the pair of links it by a bolt 6, between the'head and out of which and the adjacent links 5 spring-washers 7 may be interposed, or the nuts 8 on the connecting-bolts 9 may be tightened up sufliciently to produce the necessary frictional retardation to relative motion between the two rods. The joints between the links a and link or lever 12 may also for a like purpose be so made as to produce a small amount of friction at these points.

Figs. 14 and 15 show other arrangements for a like purpose. connections a between the two lever-arms m and the lever '0 arecom posed of spring-blades, and the-lever v is provided with blocks 10 of india-rubber, which by comingin contact with the adjacent spring-'blade'g will prevent un- Ineach of these cases the.

due relative ,inotion between'the two spring con meeting-blades u and levers m. In Fig. 14 the spring-blades u are connected to the levers m through eyepieces 11. In Fig. 15the outer end of each spring-blade a is fixed by a bolt 12 to a lug 13,.that is fixed to the corresponding lever m and has a curved bearing-surface 14 concentric with the axis of the pivot-pin a.

By connecting pairs of levers m of the kind specified to the spring-blades gin the manner set forth the levers of each pair are caused to move inward or outward in unison, and thus not only control the said spring-blades, but also one another, without the necessity of using any intermediate mechanical device to secure the stability necessary for overcoming considerable resistance offered by a slidevalve.

Each lever m may be of angular shape, as seen in end view and as shown in Figs. 1 to 5, or of curved shape, as shown in Fig. 6, and may consist of a single bar or, as in the examples shown, of two. parallel bars secured at a suitable distance apart. (See Fig. 3.) Each link u in the example shown is also shown as made don blethat is to say, of two bars arranged side by side at a short distance apart; but a single bar might be used. A suitable buffer or stop 14 is provided on the drum 0 to limit the inward movement of each lever. The outer rim of the drum serves to limit the outward movement of such lever. The free end of each lever m, which in some cases may ex- Each spring-back tmay advantageously be formed with a convex surface next the concave side of its spring-blade g and be connected to one end of a strip of spring metal 17, the other end of which is fixed to one or other end of the corresponding spring-blade g, as shown in Fig. 16, where it is shown as attached to the outer movable end of the spring-blade, so that the said spring-back can roll on the spring-blade.

The free ends of the spring-blades g may be fixed to a connecting-piece f, consisting of an approximately I-shaped casting that is provided with a stud or projection 18, arranged to work through aleather-faced guide 19 on the governor-drum and provided with a nut or other stop 20, whereby the connected ends of the spring-blades g are caused to move in a rectilinear direction and their inward movement limited.

To enable the fixed ends of the two springblades 9 to be brought closer together than heretofore, they may advantageously be fixed to two arms 21, Fig. 5, that are mounted to turn on the same pivot-pin 22 and are provided with extensions 23, against which'the two arms 24 of a separate speeding device act. 25 is a bracket on the drum for carrying the right and left handed screw 7c,with operatingwheel 26 for "causing the arms 24, and consequently the arms 2l,tomove toward and from each otherfor increasing or reducing the stifiness of the spring-blades g in order to vary the speed at which the governor will act to cut ofi steam, as well understood.

What I claim is- 1. In an engine-governor, the combination of a rotary carrier, a shifting eccentric, means for adjusting the position of the shifting eecentric to be carried thereby, and two oppositely-arranged pairs of similar levers, the two levers of each pair being pivoted to said carrier, connected near their pivoted ends to said adjusting means, and acting by rotation of said carrier as centrifugal weights to operate said adjusting means.

2. In an engine-governor, the combination of a rotary carrier, a shifting eccentric, means adapted to adjust the position of the shifting eccentric carried thereby in a direction transverse to the governor-shaft, two oppositelyarranged pairs of similar levers, the two levers of each pair being pivoted near together on said carrier and acting by rotation of said carrier-as centrifugal weights to operate said adjusting means, and means connecting each pair of said levers near their pivoted ends to said adjusting means.

3. In anengine-governor, the combination of a rotary carrier, a shifting eccentric, means adapted to adjust the position of the shifting eccentric carried thereby in a direction transverse to the governor-shaft, two oppositelyarranged pairs of similar levers, the two levers of each pair being pivoted near together on said carrier and acting by rotation of said carrier as centrifugal weights to operate said adjusting means, and flexible connecting means uniting each pair of levers near their pivoted ends to said adjusting means.

4. In an engine-governor, the combination of a rotary carrier, a shifting eccentric, a spring loaded eccentric supporting device mounted thereon and having a tendency to move in one direction transverse to the governor-shaft, two pairs of similar lever-arms, each pair of lever-arms being mounted on said carrier at opposite sides of the axis there- "of and tending when said carrier is rotated to act as centrifugal weights and move said loaded eccentric-supporting device in the op posite direction, and means connecting each pair of levers near their points of attachment to said'carrier to said spring-loaded eccentricsupporting device.

5. In an engine-governor, the combination of a rotary carrier, a shifting eccentric, a springloaded eccentricsupporting device mounted thereon and having a tendency to move in one direction transverse to'the governor-shaft, two pairs of similar lever-arms, each pair of lever-arms being mounted on said carrier at opposite sides of the axis thereof and tending when said carrier is rotated to act as centrifugal weights and move said loaded eccentric-supporting device in the op posite direction, and flexiblecompensating.

rier and to said spring-loaded eccentric-supporting device.

6. In an engine-governor, the combination of a shifting eccentric,spring-controlled mechanism for moving said eccentric in one direction, similar levers of the second order pivoted at opposite sides of the axis of said carrier with the pivoted ends of each pair near together and tending upon rotation of the carrier to act as centrifugal Weights and adjust the position of said eccentric in the opposite direction, and separate flexible compensating connections attached to each pair of levers near their pivoted ends and to said spring-controlled mechanism.

7. An engine-governor comprising a rotary carrier, a shifting eccentric, spring-blades connected at one end to said carrier and at the other end to an eccentric-supporting device movably mounted on said carrier, similar levers of the second order pivoted to said carrier at opposite sides of the axis thereof with the pivoted ends of the lovers in each pair near together and their other ends free and adapted to act as centrifugal weights, and means connecting the levers of each pair near their pivoted ends to said spring-blades, substantially as described.

8. An engine-governor comprising a rotary carrier, a shifting eccentric, spring-blades connected at one end to said carrier and at the other end to an eccentric-supporting device movably mounted on said carrier, similar levers of the second order pivoted to said carrier at opposite sides of the axis thereof with the pivoted ends of the levers in each pair near together and their other ends free, said levers being adapted to act as centrifugal weights, a spring back orholder acting against the inner side ofv each spring blade, and means connecting each spring back or holder to the levers of each pair near to their pivoted ends, substantially as described.

9. An engine-governor comprising a rotary carrier, a shifting eccentric, spring-blades connected at one end to said carrier and at the other end to an eccentric-supporting device movably mounted on said carrier, similar levers of the second order pivoted to said carrier at opposite sides of the axis thereof with the pivoted ends of the levers in each pair near together and their other ends free, said levers being adapted to act as centrifugal weights,a spring back or holder acting against the inner side of each spring-blade, and flexible compensating connecting means jointed to each spring back or holder and to the corresponding pair of levers near to their pivoted ends, substantially as described.

10. An engine-governor comprising a rotary carrier, a shifting eccentric, spring-blades connected at one end to said carrier and at the other end to an eccentric-supporting device movably mounted on said carrier, similar levers of the second order pivoted to said carrier at opposite sides of the axisthereof with the pivoted ends of the levers in each connected at one end to said eccentric and at the other end to adjustable supports mounted on said carrier, similar levers of the second order pivoted to said carrier at opposite sides of the axis thereof with the pivoted ends of the levers in each pair near together and their other ends spaced apart and free, said levers being adapted to act as centrifugal weights, and means connecting the central portion of each spring-blade to the corresponding pair of levers near to their pivoted ends, substantially as described.

12. In an engine-governor, the combination of a rotary carrier, a shifting eccentric, means adapted to adjust the position of a shifting eccentric carried thereby in a direction transverse to the governor-shaft, similar levers of the second order pivoted near together on said carrier and acting by rotation of said carrier as centrifugal Weights to operate said adjusting means, and adjustable connecting devices uniting each pair of levers near their pivoted ends to said adjusting means.

13. In an engine-governor, the combination of a rotary carrier, a shifting eccentric, means adapted to adjust the position of the shifting eccentric carried thereby in a direction transverse to the governor-shaft, similar levers of the second order pivoted near together on said carrier and acting by rotation of said carrier as centrifugal Weights to operate said adjusting means, connecting devices uniting each pair of levers near their pivoted ends to said adjusting means, and means adapted to prevent or retard sudden relative movement of the connecting means of each pair of levers.

14. An engine-governor comprisinga rotary carrier, a shifting eccentric, spring-blades connected at one end to said carrier and at the other end to an eccentric-supporting device movably mounted on said carrier, similar levers of the second order pivoted to said carrier at opposite sides of the axis thereof with the pivoted ends of the levers in each pair near together and their other ends free, said levers being adapted to act as centrifugal weights, aspring back or holder acting against the inner side of each spring-blade, flexible connecting means jointed to each spring back or holder and to the corresponding pairs of levers near to their pivoted ends, and means adapted to retard relative movement of different parts of said connecting means and the levers connected thereto, substantially as described.

15. An engine-governor comprisinga rotary carrier, a shifting eccentric, a pair of springblades connected at one end to said carrier and at the other end to said eccentric, similar levers of the second order pivoted to said carrier at opposite sides of the axis thereof wtih the pivoted ends of each pair mounted to turn about the same axis, said levers being adapted to act as centrifugal weights, one or more guide-pulleys mounted in a holder arranged to pull on the central portion of each springblade, and one or more flexible connections attached at its or their ends to each pair of levers at points equidistant from their common axis of rotation and passing around the corresponding guide pulley or pulleys, substantially as described.

16. An engine-governor comprising a rotary carrier, a shifting eccentric, a pair of springthe pivoted ends of each pair mounted to turn about the same axis, said levers being adapted to act as centrifugal weights, compensating means connected to each pair of levers at points near to their ends and to said springblades, and devices adapted to prevent or retard relative movement between different parts of said compensating means and the levers connected thereto, substantially as described.

, 17. An engine-governorcomprisingarotary carrier, a shifting eccentric, spring-blades connected at one end through a connectingpiece to said eccentric and. at the other end to adjustable supports mounted to turn about the same axis on said carrier, and independent speeding mechanism adapted to cause said supports to move to and from each other, substantially as described.

Signed at the city of Oxford, in the county of Oxford, England, this 15th day of July, 1899.

ARTHUR SAMUEL FRANCIS ROBINSON.

Witnesses: I

FREDK. P. THORNTON, ERNEST A. BACON. 

